Complete E-Commerce

Hi, I need a complete e-commerce portal, that should have clean admin panel, and excellent front end (should have pleasing look). E-Commerce site should have the following features: 1) Should be able to upload front-end templates from back-end like joomla. 2) Should be able to pull the reports like shipping details and products sold for a particular period. 3) Should be able to generate automated invoice. 4) Should have coupon codes, etc... Should have all other features of PrestaShop.